Improvement in vessels for molding pitch



E. B. WARREN a s. c.N1PPEs. VESSELS FOR MOLDING FITCH.

Patented Sept. 11, 1877.

wzesses.

EBENEZER B. WARREN AND JOHN C. NIPPES, OF PHILADELPHIA, PA.

IMPRVENIENT IN VESSELS FOR MOLDING PITCH.

Specification forming part of Letters PatentNo. 195,063, dated September11, 1877; application tiled June 1,

To all whom it 'may concern:

Be it known that we, EBENEZER BURGESS WARREN and JOHN C. NIPPEs, of thecity and county of Philadelphia, in the State of Pennsylvania, haveinvented certain new and useful Improvements in Molding Pitch and othermaterial that solidies in cooling, which improvement is fully set forthin the following specication, reference being had to the accompanyingdrawings, in which- Figure l is a side elevation of our improved mold.Fig. 2 is a vertical section at the line w a: of Fig. l. Fig. 3 is across-section at the line y y of Fig. l.

Like letters of reference in all the figures indicate the same parts.

Our invention consists of a mold composed of an open and expanding ring,formed of a sheet of metal having in one of its joint vertical edges agroove in line with the plane of the sheet to receive the other andplain edge ofthe same into connection therewith, a hoop for drawing theedges together and holding the ring in its closed position to form thewall of the mold, and a loose bottom with which the lower end of thering forms a butt-joint, as hereinafter fully described.

The mold, with the exception of the loose bottom and its mode ofconnection with the ring, is the same as set forth in our applicationfor Letters Patent for a like invention filed April 5, 1877.

A represents an open ring, formed of a sheet of metal, and constitutesthe continuous wall of the mold. B is the bottom ofthe mold, and U ahoop, which encircles the ring A, to confine the vertical edges b and btogether during the liquid state of the pitch. 1n order to form a closejoint with said edges the edge b has a vertical groove, c, in line withthe plane of the sheet which forms the ring to receive the edge b.

The bottom B is made in any suitable manner so as to be level, or nearlyso, to receive the ring A, which is placed loosely upon it.

It should be suiciently stiff to prevent it yielding to the weight ofthe melted pitch or other material when poured into the mold.

In order to give proper stiffness to a minimum thickness of metal, andto form a rim for expediting the process of' luting, and g1ving greaterefciency thereto, we prefer turning up the edge, as shown in thedrawlngs, not confining ourselves, however, to any particular plan inthe construction or form of the edge or rim.

In preparing the mold for the reception of the melted material thebottom B is laid down on a level surface, and the ring A,which isclosed, with the hoop C, placed thereon. Then the vertical joint of thering is luted, and the lower end of the ring is luted to the bottom, toprevent the pitch or other material running out while hot, the turned-up edge or rim g facilitating making a perfect luting of 1 the pointsof contact ofthe bottom joint.

By making the bottom B loose from the ring A the parts of the mold areeasily closed, ready to receive the melted pitch; and when the materialcools the mold is readily removed therefrom by knocking oft' the hoop C.The joint vertical edges ofthe ring, being thus unconined, spring apartand from the molded block, so as to completely skin the ring therefrom.

We claim as our invention- In a vessel for molding pitch or othermaterial that solidies in cooling, the combination of the open andexpanding ring A, having in its joint b a groove, c, for connecting theedge b therewith, and the bottom B forming a butt-joint with the lowerend of the ring, substantially in the manner and for the purpose setforth.

y E. BURGESS WARREN.

JOHN O. NIPPES.

Witnesses:

THOMAS J. BEWLEY, STEPHEN UsTIoK.

Frron.

